public class Miao {
    public static void main(String[] args) {
        //一天的毫秒数
        long milliseconds_per_day = 24L * 60 * 60 * 1000;
        //一天的微秒数
        long microseconds_per_day = 24L * 60 * 60 * 1000 * 1000;
        //输出变量值
        System.out.print("一天的毫秒数: "+milliseconds_per_day);
        System.out.print("一天的微秒数: "+microseconds_per_day);
        }
}